/[pcsx2_0.9.7]/trunk/3rdparty/portaudio/include/pa_linux_alsa.h
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Contents of /trunk/3rdparty/portaudio/include/pa_linux_alsa.h

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Revision 273 - (show annotations) (download)
Fri Nov 12 01:10:22 2010 UTC (9 years, 2 months ago) by william
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Auto Commited Import of: pcsx2-0.9.7-DEBUG (upstream: v0.9.7.4013 local: v0.9.7.197-latest) in ./trunk
1 #ifndef PA_LINUX_ALSA_H
2 #define PA_LINUX_ALSA_H
3
4 /*
5 * $Id: pa_linux_alsa.h 1414 2009-05-24 17:02:10Z aknudsen $
6 * PortAudio Portable Real-Time Audio Library
7 * ALSA-specific extensions
8 *
9 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining
12 * a copy of this software and associated documentation files
13 * (the "Software"), to deal in the Software without restriction,
14 * including without limitation the rights to use, copy, modify, merge,
15 * publish, distribute, sublicense, and/or sell copies of the Software,
16 * and to permit persons to whom the Software is furnished to do so,
17 * subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be
20 * included in all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
25 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
26 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
27 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 */
30
31 /*
32 * The text above constitutes the entire PortAudio license; however,
33 * the PortAudio community also makes the following non-binding requests:
34 *
35 * Any person wishing to distribute modifications to the Software is
36 * requested to send the modifications to the original developer so that
37 * they can be incorporated into the canonical version. It is also
38 * requested that these non-binding requests be included along with the
39 * license above.
40 */
41
42 /** @file
43 * @ingroup public_header
44 * @brief ALSA-specific PortAudio API extension header file.
45 */
46 #include "portaudio.h"
47
48 #ifdef __cplusplus
49 extern "C" {
50 #endif
51
52 typedef struct PaAlsaStreamInfo
53 {
54 unsigned long size;
55 PaHostApiTypeId hostApiType;
56 unsigned long version;
57
58 const char *deviceString;
59 }
60 PaAlsaStreamInfo;
61
62 /** Initialize host API specific structure, call this before setting relevant attributes. */
63 void PaAlsa_InitializeStreamInfo( PaAlsaStreamInfo *info );
64
65 /** Instruct whether to enable real-time priority when starting the audio thread.
66 *
67 * If this is turned on by the stream is started, the audio callback thread will be created
68 * with the FIFO scheduling policy, which is suitable for realtime operation.
69 **/
70 void PaAlsa_EnableRealtimeScheduling( PaStream *s, int enable );
71
72 #if 0
73 void PaAlsa_EnableWatchdog( PaStream *s, int enable );
74 #endif
75
76 /** Get the ALSA-lib card index of this stream's input device. */
77 PaError PaAlsa_GetStreamInputCard( PaStream *s, int *card );
78
79 /** Get the ALSA-lib card index of this stream's output device. */
80 PaError PaAlsa_GetStreamOutputCard( PaStream *s, int *card );
81
82 /** Set the number of periods (buffer fragments) to configure devices with.
83 *
84 * By default the number of periods is 4, this is the lowest number of periods that works well on
85 * the author's soundcard.
86 * @param numPeriods The number of periods.
87 */
88 PaError PaAlsa_SetNumPeriods( int numPeriods );
89
90 /** Set the maximum number of times to retry opening busy device (sleeping for a
91 * short interval inbetween).
92 */
93 PaError PaAlsa_SetRetriesBusy( int retries );
94
95 #ifdef __cplusplus
96 }
97 #endif
98
99 #endif

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